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| Monitoring Remote Sensing of dynamic change of vegetation coverage in Zhenglan Banner |
| Fan Jianyou1,2, Ding Guodong1, Guan Boyuan3, Wang Xian1, Li Suyan1, Yang Tingling1 |
| 1.College of Soil and Water Conservation, Beijing Forestry University, 100083, Beijing;2.Scientific Research Institute of Pearl River Water Resources Commission, 510611, Guangzhou;3.Bei Hang University, 100083, Beijing: China |
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Abstract To reveal the variation law of Otindag sand vegetation, remote sensing quantitative model of vegetation coverage in the Zhenglan Banner under TM is images established based on NDVI and a sub-pixel vegetation coverage model. The dynamic variation of vegetation coverage in Zhenglan Banner in 1987 and 2001 are studied on the basis of above approaches, and the results indicate that the vegetation coverage in Zhenglan Banner mainly has been made up of the medium and high cover degree vegetation which accounted for 94.46 % of the total land area in 1987 and 88.92% in 2001. The area of high cover degree vegetation has decreased by 45.92% heavily while the area of low cover degree vegetation and farmland has remarkably increased from 1987 to 2001. The transformation of vegetation coverage type focuses on vegetation degrading, which is 85.17% of the area that has experienced the transformation of vegetation coverage type. The tendency of vegetation cover transformation in Zhenglan Banner speaks serious deterioration of its ecological environment.
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Received: 18 September 2004
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